74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
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/** @file
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Implementation of the SNP.Shutdown() function and its private helpers if any.
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Copyright (C) 2013, Red Hat, Inc.
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Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2017, AMD Inc, All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/UefiBootServicesTableLib.h>
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#include "VirtioNet.h"
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/**
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Resets a network adapter and leaves it in a state that is safe for another
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driver to initialize.
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@param This Protocol instance pointer.
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@retval EFI_SUCCESS The network interface was shutdown.
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@retval EFI_NOT_STARTED The network interface has not been started.
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@retval EFI_INVALID_PARAMETER One or more of the parameters has an
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unsupported value.
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@retval EFI_DEVICE_ERROR The command could not be sent to the network
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interface.
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@retval EFI_UNSUPPORTED This function is not supported by the network
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interface.
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**/
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EFI_STATUS
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EFIAPI
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VirtioNetShutdown (
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IN EFI_SIMPLE_NETWORK_PROTOCOL *This
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)
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{
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VNET_DEV *Dev;
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EFI_TPL OldTpl;
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EFI_STATUS Status;
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if (This == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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Dev = VIRTIO_NET_FROM_SNP (This);
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OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
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switch (Dev->Snm.State) {
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case EfiSimpleNetworkStopped:
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Status = EFI_NOT_STARTED;
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goto Exit;
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case EfiSimpleNetworkStarted:
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Status = EFI_DEVICE_ERROR;
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goto Exit;
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default:
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break;
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}
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Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
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VirtioNetShutdownRx (Dev);
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VirtioNetShutdownTx (Dev);
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VirtioNetUninitRing (Dev, &Dev->TxRing, Dev->TxRingMap);
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VirtioNetUninitRing (Dev, &Dev->RxRing, Dev->RxRingMap);
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Dev->Snm.State = EfiSimpleNetworkStarted;
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Status = EFI_SUCCESS;
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Exit:
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gBS->RestoreTPL (OldTpl);
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return Status;
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}
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